What License Do You Need to Start a Plumbing Business? State Rules for 2026

To start a plumbing business you need a state plumbing license (or, in a few places, a local one) that lets your company offer plumbing work, and that license has to be tied to a person who passed the trade exam: a master plumber, a plumbing contractor or a qualifying agent. Each plumber who works on your crew then needs the individual license or registration your state sets for their level, and in a state like Pennsylvania, where the Department of Labor and Industry says there is no state licensing for most construction contractors, plumbing licensing is set by your city or township.

At a glance

• Texas and Florida: a company may not offer plumbing without a master plumber on its license in Texas (TSBPE Rule 367.9) or a certified or registered qualifying agent in Florida (Fla. Stat. 489.119).
• Georgia and Massachusetts: the business side runs through a master plumber. Georgia's Secretary of State says only licensed Master Plumbers may have a plumbing business, and Massachusetts issues corporate certificates only to master plumbers (G.L. c. 142, s. 3B).
• North Carolina, California and Arizona: a state board licenses the company and ties it to a named qualifier (G.S. 87-26, CSLB, A.R.S. 32-1122).
• Pennsylvania: the Department of Labor and Industry says the state has no licensing for most construction contractors, so plumbing rules come from the municipality.

The layers of plumbing licensing

A startup has to clear each layer its state uses. Our contractor license guide walks through every state, and this page narrows it to plumbing.

The first layer is the company license, which is the permission to advertise, bid and contract for plumbing work. States attach it to a person. In Texas that person is the Responsible Master Plumber, in Florida it is the qualifying agent, and in California it is the RMO or RME. It is also a different thing from a city business license (see contractor license vs business license).

The second layer is the individual license for the people doing the work. Many states split it into apprentice, journeyman and master levels, and our journeyman vs master plumber guide explains how they differ.

The third layer is local registration, and it matters only where a state names it. Florida has registered contractors who are licensed for one local jurisdiction, Massachusetts leaves permits and bonding to each city and town, and Pennsylvania leaves licensing to the municipality. Where a source we opened named no local plumbing license, we do not guess, and you should still confirm permit rules with the city where you will work.

State by state: eight sourced examples

We opened each source below on October 12, 2026. The table gives the company layer, and the notes give the detail and the individual layer. For the broader picture, see the plumbing contractor license guide by state.

• Texas. Under the Texas State Board of Plumbing Examiners rules, a person or company may not advertise, contract for or offer plumbing work to the public without a Responsible Master Plumber (RMP) who holds a current Master Plumber license and is an employee or the owner (Rule 367.9). The RMP may act for only one company at a time (Rule 361.1), and the board's RMP page requires at least $300,000 of commercial liability insurance. Workers sit below that: a Journeyman Plumber is defined by 8,000 hours under an RMP, and a Tradesman Plumber-Limited by 4,000 hours and work on one and two family dwellings.
• Florida. Under Fla. Stat. 489.115, no one may engage in contracting in Florida without being certified or registered in the proper classification, and section 489.105 defines a plumbing contractor as one whose services are unlimited in the plumbing trade. A business that is not a sole proprietorship must apply for certification or registration as the qualifying agent of the business, attesting final approval authority over construction work and business matters (489.119). If the qualifying agent leaves and was the only certified or registered contractor, the business has 60 days to employ another one and may not contract until then, except under a temporary certificate for incomplete contracts.
• Georgia. The Secretary of State's Division of Master and Journeyman Plumbers issues Journeyman, Class I Master and Class II Master Plumber licenses. Class I is limited to single-family dwellings, one-level dwellings designed for not more than two families, and commercial structures not exceeding 10,000 square feet, and Class II has no restrictions. The board does not register plumbing companies, and its FAQ notes that only licensed Master Plumbers may have a business. A master applicant documents at least five years of experience, two of them as a licensed journeyman, and the Division's how-to guide says you may not legally perform services until you hold an active license.
• North Carolina. G.S. 87-21 requires a license before any person, firm or corporation engages in or offers to engage in plumbing, heating or fire sprinkler contracting, with Class I covering all structures and Class II covering single-family detached homes. A corporation's license requires one or more officers or full time employees empowered to act for it to be licensed, and they must execute contracts and exercise general supervision (G.S. 87-26). The Board's FAQ adds that each place of business needs a listed qualified individual regularly on active duty, that licensed work may be done by the licensee or the firm's bona fide W-2 employees, and that work must stop if that person leaves until another licensee is put in place. A bona fide employee of a licensee is not treated as engaged in contracting (G.S. 87-25).
• California. The Contractors State License Board licenses plumbing contractors in classification C-36, which covers water supply, waste removal, gas piping and water heater installation, and a license is required when a project needs a building permit, uses any additional workers, or has a combined labor and materials value of $1,000 or more. Every license needs a qualifying individual with four full years of journey level, foreman, supervisor or contractor experience in the classification within the ten years before filing. For a corporation that person is an RMO (an officer) or an RME, a bona fide employee working at least 32 hours a week or 80 percent of the business's operating hours, whichever is less. The CSLB also exempts a wage employee who does not run an independent business, so a plumber on your payroll does not need a separate contractor license.
• Massachusetts. G.L. c. 142, s. 3 says no one may engage in business as a master plumber, or work as a journeyman or apprentice plumber, or solicit work by sign, listing or advertisement, without a license from the Board of State Examiners of Plumbers and Gas Fitters. Section 3B lets a licensed master plumber obtain a certificate for a plumbing corporation, provided the master plumber is an officer, and a partnership certificate requires every partner to be a master plumber. A master who employs an unlicensed journeyman or apprentice faces a fine under section 16. A licensed plumber working as a self-employed contractor needs liability insurance with completed operations coverage, or a bond, to be issued a permit (section 21A).
• Arizona. The Registrar of Contractors licenses plumbing contractors, and A.R.S. 32-1121(A)(14) lets someone who is not a licensed contractor do one project under $1,000 only if the work is casual or minor, needs no local building permit, is not split up or part of a larger job, and is not advertised without the words "not a licensed contractor." The same section says that exemption never covers fire safety work, including fire sprinklers and the plumbing tied to them, or work that connects to a supply of natural gas, propane or other fuel gas. A qualifying party is the person responsible for the license who either has an ownership interest in it or is regularly employed by the licensee (A.R.S. 32-1101). Under 32-1122 that person needs four years of trade experience, at least two within the last ten, and must pass the required examination.
• Pennsylvania. The Department of Labor and Industry states that the Commonwealth has no licensure or certification requirements for most construction contractors or their employees, and that some of its 2,562 municipalities set their own licensing for plumbing contractors or plumbers. The Department keeps no records of which ones do, so you contact the municipality where the work will happen. Most home improvement contractors must also register with the Attorney General's Office.

For the full ladder in each state, see our guides for Texas, Florida, Georgia, North Carolina, California, Massachusetts, Arizona and Pennsylvania plumbing licenses. The qualifier rules are explained in the Texas, Florida, Georgia, North Carolina, California and Massachusetts qualifier guides, and in what a qualifying party is for Arizona.

What to do if the owner is not a licensed plumber

Plenty of plumbing companies are owned by people who run the business and do not hold the trade license. In every state above except Pennsylvania, the company can operate only when a person with the right license is attached to it and answers for the work.

Which person qualifies depends on the state. Texas accepts an employee or the owner as the Responsible Master Plumber, North Carolina accepts a listed officer or a full time employee, California accepts an officer (RMO) or a bona fide employee (RME), and Arizona accepts an owner or a regularly employed person as qualifying party. Georgia and Massachusetts tie the business more tightly to the master plumber, so confirm with the board how a non-plumber owner can be structured before you form the company.

The qualifier has to be real, because boards expect that person to supervise the work. Florida requires an affidavit of final approval authority over construction work and business matters, and North Carolina requires general supervision over contracts to completion. A 1099 arrangement is the usual trap, and our guide on whether a qualifying agent can be a 1099 contractor explains why a board such as North Carolina's names W-2 employees.

Steps to take before your first plumbing job

1. Find the board that licenses plumbing in the state where you will work, and confirm whether it licenses the company, a person or both.
2. Decide who will qualify the company: you, a partner, or a qualified employee. Check that the person meets the experience and exam requirements for that classification.
3. Set up insurance and any bond the state names, such as the Texas RMP insurance or the Massachusetts permit insurance rule, before you apply for permits.
4. Check that every worker holds the license or registration their level needs, including apprentices.
5. Ask the city or township about permits, local registration and any separate business license before you advertise or bid. For small jobs, see whether replacing a water heater needs a license where you work.

Frequently asked questions

Can I start a plumbing business if I am not a plumber? In states that let an employee or officer qualify the company, such as Texas, Florida, North Carolina, California and Arizona, yes, as long as a licensed person qualifies the company and you do not advertise or contract until that person is in place. In Georgia and Massachusetts the sources tie the business to a master plumber, so ask the board how ownership can be structured.

Do all my plumbers need their own licenses? It depends on the state. Texas and Massachusetts license or register each level, including apprentices, Georgia licenses journeymen and masters, California exempts a bona fide wage employee from the contractor license, and in Pennsylvania plumbing licensing is set by municipalities, since the state has no licensing for most construction contractors.

What happens if my qualifier quits? In Florida the business has 60 days to employ another qualifying agent if the departing one was its only certified or registered contractor, and it may not contract until then. In North Carolina, work must cease until another licensee is in place as the firm's qualifier.

Does a state plumbing license replace a business license? No. A plumbing license authorizes the work, and your city or county may still require a business registration or permits.

Where a qualifying agent fits

If you own a plumbing company but not the trade license, a qualifying agent can fill that seat. A qualifying agent QUALIFIES your company as an owner or full time W-2 employee who supervises the work, which is exactly what the boards above look for. Read what a qualifying agent is and how to hire a qualifying agent, or review our contractor qualifier services. For the plumbing-specific rules by state, see the plumbing contractor qualifying agent guide, and for multi-state plans we offer licensing services in all 50 states.

Talk to people who have held these licenses

Marshall Schofield and Jeremiah Jaskulski are licensed general contractors, master electricians, master plumbers and master mechanical contractors, and The Licensing Company helps owners clear exactly these requirements. If you are planning a plumbing company, call 615-219-2110 and tell us the state, and we will show you the licensing path that fits.

Sources

Retrieved October 12, 2026.

• Texas State Board of Plumbing Examiners, Responsible Master Plumber
• TSBPE Administrative Rules, March 2026 (the board's reading copy of 22 TAC Chapters 361 to 367)
• Florida Statutes 489.105, Definitions
• Florida Statutes 489.115, Certification and registration
• Florida Statutes 489.119, Business organizations and qualifying agents
• Georgia Secretary of State, Division of Master and Journeyman Plumbers FAQ
• Georgia Secretary of State, How-To Guide: Plumber License
• North Carolina General Statutes, Chapter 87, Article 2
• North Carolina Plumbing, Heating and Fire Sprinkler Contractors Board, FAQ
• CSLB, C-36 Plumbing Contractor classification
• CSLB, Step 1: Before Applying for the Examination
• Massachusetts General Laws c. 142, s. 3
• Massachusetts General Laws c. 142, s. 3B
• Massachusetts General Laws c. 142, s. 16
• Massachusetts General Laws c. 142, s. 21A
• Arizona Revised Statutes 32-1101, Definitions
• Arizona Revised Statutes 32-1121, Persons not required to be licensed
• Arizona Revised Statutes 32-1122, Qualifications for license
• Pennsylvania Department of Labor and Industry, Contractor Licensing